Note: This article contains affiliate links. If you click on these links and make a purchase, I may earn a small commission at no extra cost to you. This helps support my research and content. Read my full affiliate disclosure here.
Choosing the right Infiniti G37 radiator hose matters because it carries coolant that keeps your engine at safe operating temperatures. A failing hose can lead to overheating, loss of coolant, or unexpected breakdowns, so selecting a durable, correctly fitted replacement is important. This guide shortlists the top-rated hoses for the Infiniti G37 and explains the criteria used to pick them, including material quality, connector and clamp compatibility, and fitment accuracy. Use the notes below to compare options and find a hose that matches your maintenance goals and driving conditions.
Looking for other parts? See all Infiniti G37 parts & accessories.
Top Picks at a Glance
| Best Reviewed A top-rated pick with lots of positive feedback | Dayco 71850 Upper Curved Radiator Hose |  |
| Most Popular A crowd favorite that many people choose with confidence | Gates 22309 Upper Radiator Hose |  |
| Best Quality Built to a higher standard if you want something more solid | ACDelco Gold Molded Upper Radiator Hose (26064X) |  |
| Best Budget The cheapest option that still gets the job done reliably | Dayco 71967 Upper Radiator Hose |  |
| Most Sold A high-volume bestseller chosen again and again | YGDMD Silicone Heater Hose 1" ID, 5 ft |  |
| Best Value for Money The sweet spot between price and what you get | Continental Molded Radiator Hose 66303 |  |
| Best Overall The best all-around choice for most situations | ACDelco Gold Molded Upper Radiator Hose |  |
1. Dayco 71850 Upper Curved Radiator Hose
| Length | 17 Inches |
|---|---|
| Material | rayon |
| Manufacturer Part Number | 71850 |
| Manufacturer | Dayco |
This Dayco upper curved radiator hose is a direct-fit style replacement designed for the cooling circuit on the Infiniti G37. It is reinforced with knitted rayon and described as heavy duty to resist coolants, road debris and temperature cycles, which translates to good burst resistance and longer service life compared with generic hoses. Typical use is a like-for-like swap when the factory upper hose shows age, cracks, or soft spots; the curved shape and 17-inch length match the original routing so installation is straightforward for a home mechanic or shop. The practical benefits are reliable coolant containment, OEM-quality fit, and materials that tolerate heat and chemical exposure. Limitations to note are that some buyers trimmed length for a perfect fit, so minor adjustments may be necessary depending on year-specific routing or clamp placement, and the listing does not include installation hardware or clamps.
Best for: Reliability-focused buyers who prioritize a factory-quality replacement that keeps the G37 cooling system dependable over time and prefer parts that match original fit and function.
Less Ideal for: Owners seeking a universal or adjustable hose solution, a kit with clamps, or a performance silicone upgrade should consider other options instead.
- Factory-quality replacement fit and shape for easy installation on specified routing
- Reinforced with knitted rayon for improved burst resistance and durability
- Heavy-duty construction resists coolant, road debris and temperature variations
- May require slight trimming or adjustment for some vehicle-year routing or clamp locations
- Does not include clamps or additional installation hardware
Verdict A straightforward, factory-quality upper radiator hose replacement for the Infiniti G37 that emphasizes durability and reliable fitment, though minor trimming or separate clamps may be needed.
2. Gates 22309 Upper Radiator Hose
| Material | Nitrile Rubber |
|---|---|
| Manufacturer | Gates |
| Model | 22309 |
| Color | Black |
This Gates 22309 upper radiator hose is a direct replacement-style hose intended to restore coolant flow between the radiator and engine on compatible vehicles. It is made of nitrile rubber and comes shaped to the correct bends so installation is straightforward for a routine coolant-system repair on an Infiniti G37. The hose’s factory-style contour and solid-wall construction mean it slips onto the radiator and engine nipples cleanly and seals well with standard constant-tension or worm-drive clamps. Several users report the part arrives slightly long, so trimming a small amount at each end can be necessary to match exact OEM routing. That extra length also gives installers a little margin to cut a fresh end for a cleaner seal. Expect the hose to perform like a factory-quality replacement and provide multi-year service when installed correctly, but plan to replace worn clamps at the same time and check fitment before tightening clamps fully.
Best for: Convenience-driven owners who want a straightforward, factory-style replacement that installs quickly and gets the Infiniti G37 back on the road with minimal fuss.
Less Ideal for: Buyers seeking a heavy-duty performance upgrade or silicone hose with extended temperature tolerance should consider higher-spec aftermarket hoses instead.
- Factory-contoured shape simplifies installation and restores correct coolant routing
- Nitrile rubber construction offers durable, heat-resistant performance consistent with replacement hoses
- Arrives slightly long so you can trim for an exact fit and fresh sealing surfaces
- May require trimming at one or both ends to match factory hose length
- Does not include replacement clamps or fittings, so you may need new clamps for reliable sealing
Verdict A practical, factory-contour replacement hose that fits and installs easily on the Infiniti G37 but may need trimming and new clamps for best results.
3. ACDelco Gold Molded Upper Radiator Hose (26064X)
| Brand | ACDelco |
|---|---|
| Material | Plastic, Rubber |
| Manufacturer Part Number | 88908762 |
| OEM Part Number | 88908762 |
| Model | ACDelco – Upper Molded Co (B) (26064X) |
This ACDelco Gold molded upper radiator hose is intended to replace a vehicle's upper radiator coolant hose and restore factory-style coolant routing and seal. It is typically used during routine cooling system repairs or when the original hose shows age-related cracking, leaks, or swelling. The Gold line is positioned as a premium replacement that matches factory fit, form, and function and is backed by General Motors support. In practice the molded shape simplifies installation because it arrives pre-formed for the original routing, reducing trimming or improvised bends. Buyers will get a hose made from rubber/plastic materials common to higher-quality replacements, which should resist heat and coolant exposure better than cheap universal hoses. Limitations include the need to confirm exact fitment for the Infiniti G37 application since fit depends on model year and engine variant, and some buyers have reported end diameters that differ from their original hose requiring minor adjustments or trimming.
Best for: Performance-oriented buyers who prioritize factory-quality parts and reliable cooling under spirited driving and want a direct replacement that preserves original coolant routing.
Less Ideal for: Buyers who need a guaranteed plug-and-play hose without checking year- and engine-specific fitment or those wanting adjustable universal hoses for custom setups.
- Factory-quality replacement design intended to match original fit and routing.
- Molded, pre-formed shape reduces installation time and need for bending or shaping.
- Constructed from rubber and plastic materials suitable for coolant exposure and engine heat.
- Offered in the ACDelco Gold tier which targets higher durability than basic aftermarket hoses.
- Fitment can vary by vehicle and some customers reported mismatched end diameters that required trimming or modification.
- Not explicitly listed for Infiniti G37 in the product text so verification against the G37 year and engine is required.
Verdict A factory-quality molded upper radiator hose aimed at buyers seeking durable, performance-oriented replacements, but confirm G37 fitment before installation.
4. Dayco 71967 Upper Radiator Hose
| Brand | Dayco |
|---|---|
| Material | Synthetic Rubber |
| Model | DAYCO PRODUCTS Curved Radiator Hose |
| Manufacturer Part Number | 71967 |
The Dayco 71967 upper radiator hose is a direct-fit replacement intended to restore the cooling circuit on compatible vehicles. It is made of synthetic rubber and shaped to match the factory routing so installation is typically straightforward with basic hand tools. In use it performs the simple but critical job of transporting coolant under pressure and temperature cycles; Dayco’s construction and curved profile help avoid kinks and rubbing against nearby components. Practical benefits include OEM-style fitment that reduces trimming or modification, and a thicker feel compared with some aftermarket hoses which suggests good abrasion resistance. Limitations are that this is a single-piece hose only for the upper radiator position and does not include clamps or other cooling components, so you must retain or replace those separately. Also the listing gives basic material and fit information but lacks detailed temperature or pressure ratings that professional shops sometimes prefer.
Best for: Budget-conscious DIY owners looking for a straightforward, factory-style upper radiator hose replacement for routine maintenance or to repair a leak.
Less Ideal for: Shoppers seeking a full cooling system refresh or upgraded silicone performance hoses should consider complete kits or premium hoses instead.
- Direct-fit shape that follows factory routing for straightforward installation
- Synthetic rubber construction resists typical heat and coolant exposure
- Curved profile reduces risk of kinking or contact with nearby parts
- Sold as the hose only; clamps and additional cooling parts are not included
- No detailed temperature or pressure ratings provided in the product information
Verdict A no-frills, budget-friendly factory-style upper radiator hose that makes replacing a leaking or worn upper hose simple, but you will need clamps or extra parts separately.
5. YGDMD Silicone Heater Hose 1" ID, 5 ft
| Inner diameter | 0.97 inch |
|---|---|
| Length | 5 ft |
| Material | Silicone |
| Rupture pressure | 650 PSI |
| Normal working pressure | 250 PSI |
This silicone heater hose is a straightforward replacement hose intended for coolant and heater core lines on the Infiniti G37 when a 1-inch inner diameter section is required. Made from thermal-resistant silicone it remains flexible across wide temperatures and is reinforced with polyester cord to raise rupture resistance, so it handles typical engine bay heat and pressure better than basic rubber lines. The 5-foot length is cuttable, letting you trim to the exact run and slide it onto existing fittings, which simplifies installation for a DIYer or tech. The hose is not rated for oil use and is optimized for water or gas in cooling systems, and its flexibility means you should avoid tight bends to prevent pinching. The product does not include clamps or vehicle-specific fittings so plan to reuse or buy appropriate hardware. For routine heater-hose repairs on a G37 this provides a durable, heat-tolerant option, but expect to finish the job with proper clamps and careful routing to maintain coolant flow and clearance.
Best for: Risk-averse mainstream Infiniti G37 owners who prioritize a durable, heat-tolerant factory-quality replacement and want a simple DIY-friendly hose they can cut to length.
Less Ideal for: Buyers who need a complete replacement kit with clamps and molded OEM-shaped hoses or who require a hose rated for oil service should look elsewhere.
- Silicone construction stays flexible across a wide temperature range for reliable coolant routing.
- Polyester fiber reinforcement raises rupture pressure to handle higher system stresses.
- Cut-to-length 5 ft length allows custom runs and easy trimming for exact fitment.
- High nominal working pressure rating suitable for typical vehicle cooling system demands.
- No clamps or vehicle-specific fittings included so additional hardware is required.
- Not suitable for oil transfer applications, limited to water or gas as specified.
Verdict A flexible, reinforced silicone heater hose that serves as a durable cut-to-fit coolant replacement for Infiniti G37 heater lines when clamps and routing are handled separately.
6. Continental Molded Radiator Hose 66303
| Brand | Continental |
|---|---|
| Material | Epdm |
| Manufacturer | Continental ContiTech |
| Temperature range | -40F to 275F (-40C to 135C) |
| Meets specification | SAE 20R4EC Class D1 |
This Continental molded radiator hose is a direct-style replacement designed to route glycol-based coolant through tight bends while relieving stress on radiator connections. It is typically used as an upper or lower radiator hose replacement and is molded to OEM-like configurations for straightforward installation. The hose uses EPDM rubber with synthetic knit reinforcement, which resists common coolant chemistries including ethylene and propylene glycol and long-life organic acid technology coolants. It meets SAE 20R4EC Class D1 specifications and resists electrochemical degradation, so it should last longer than generic aftermarket hoses in normal driving conditions. Practical benefits include good fit likelihood for factory-pattern installations and temperature range coverage suitable for engine cooling duty. Limitations are that fit depends on exact G37 hose routing and length since some users reported slight differences in shape or length, and it is not intended for fuel or oil service.
Best for: Practical optimizers seeking a factory-pattern, dependable replacement for routine cooling system repairs on an Infiniti G37 who prioritize durable materials and straightforward installation.
Less Ideal for: Drivers who need custom-shaped or exact-match specialty hoses for heavily modified cooling systems or those who require hoses rated for fuel or oil use should look elsewhere.
- Molded shape matches original routing to ease installation and maintain full coolant flow through tight bends
- EPDM construction with synthetic reinforcement resists common coolant chemistries and electrochemical degradation
- Meets SAE 20R4EC Class D1 specifications and many factory-quality standards
- Temperature-rated for typical engine cooling systems from -40F to 275F
- May differ slightly in length or angle from the stock G37 hose in some cases, requiring verification before installation
- Not suitable for fuel or oil transfer applications
Verdict A durable, factory-pattern EPDM radiator hose that offers solid cooling-system performance and good value for routine Infiniti G37 replacements.
7. ACDelco Gold Molded Upper Radiator Hose
| Manufacturer | ACDelco |
|---|---|
| Model | Hose,Eng Cool Htr |
| Manufacturer Part Number | 88908922 |
| Item model number | 26225X |
This ACDelco Gold molded upper radiator hose replaces a factory upper coolant hose and is intended to restore original routing and fit on vehicles where it matches the factory part. Installation is the same as a standard radiator hose swap: drain the cooling system, remove clamps, fit the hose to the inlet and outlet, and re-clamp. The hose is offered as a molded, application-specific shape to avoid rubbing and ensure correct clearance around shrouds, fans, and accessories. Backed by ACDelco Gold positioning, it aims to meet factory fit, form, and function for GM applications and similar layouts. Practical benefits include correct alignment that reduces chafing and a known-fit part that can simplify a DIY replacement. Limitations are that hose fitment is vehicle-specific so success depends on matching this exact upper hose to the Infiniti G37's required part number and routing, and the listing does not provide explicit Infiniti G37 fitment details here.
Best for: Balanced buyers who prioritize a reliable, factory-quality replacement that minimizes installation surprises and maintains original cooling routing on their vehicle.
Less Ideal for: Buyers seeking a guaranteed, direct-fit hose for an Infiniti G37 without verifying part cross-references or those who need universal or adjustable hose solutions.
- Molded shape designed to match factory routing and reduce chafing.
- Positioned as a factory-quality ACDelco Gold replacement for reliable fit and function.
- Multiple customer reports note correct fit and straightforward installation.
- Product description focuses on GM fitment and does not list explicit compatibility with Infiniti G37.
- Some buyers report slight length variance on certain vehicle applications that may require adjustment.
- Spec sheet omits vehicle-specific part cross-reference for direct G37 confirmation.
Verdict A reliable factory-quality molded upper radiator hose that works well when you confirm the exact part cross-reference for your Infiniti G37.
Choosing the Right Infiniti G37 Radiator Hose: Key Factors to Consider
Material and Construction
The hose material determines resistance to heat, coolant chemical exposure, and pressure cycles. Higher-grade materials like reinforced silicone or heavy-duty EPDM generally offer longer life and better resistance to swelling, cracking, and softening under high temperatures.
Construction details such as internal reinforcement layers, fabric braids, and wall thickness affect how the hose holds shape under pressure and temperature changes. A more robust build usually reduces the chance of bulging and failure in hot conditions.
Fitment and Dimensions
Accurate hose length, inner diameter, and molded bend geometry are critical so the hose routes without kinks and mates cleanly to the vehicle's fittings. A hose that is too short or has incorrect bends can pull at connectors, accelerate wear, or interfere with nearby components.
Verify size fitment against factory specifications and check that the hose maintains clearance around moving parts. Proper fit minimizes stress on clamps and connectors and reduces leak risk.
Connector and Clamp Compatibility
The hose ends and how they interface with your engine's nipples, pipes, or molded ports determine how well a seal is achieved. Some hoses use factory-style molded ends while others rely on slip-on designs that need specific clamp types.
Ensure the hose works with the original clamp style or that your clamps provide sufficient bite and even pressure. Using the correct clamp reduces the chance of coolant seepage and makes future maintenance easier.
Heat and Chemical Resistance
Radiator hoses are exposed to constant heat cycles and contact with coolant and sometimes engine oil or transmission fluid. A hose rated for higher temperature ranges and compatible with the coolant chemistry will resist hardening and cracking longer.
Consider hoses with documented temperature and chemical resistance ratings to match your driving conditions. Better resistance reduces degradation and the risk of sudden failures.
Durability and Service Life
Durability factors include material fatigue resistance, wall thickness, and reinforcement that prevent bulging and collapse over time. Hoses meant for longer service intervals often feature extra reinforcement or superior rubber compounds.
Look for indications of expected longevity, such as construction details and manufacturer testing standards. Prioritizing durability can reduce the frequency of replacements and the likelihood of roadside failures.
Ease of Installation
Installation ease affects both DIY and professional replacements. Hoses that match factory routing, include clear orientation, and work with common clamps save time and reduce the chance of installation errors.
Also consider whether the hose requires any trimming, special tools, or additional fittings. Simpler installations lower the chance of improper sealing and make future maintenance smoother.
FAQ
How do I know if my Infiniti G37 radiator hose needs replacing?
Check for visible signs such as cracks, bulges, soft spots, or coolant residue at connections. You may also notice low coolant levels or a sweet smell from leaking coolant. Gentle squeezing can reveal hardening or softness that indicates material degradation. If you see any of these signs, replacing the hose is usually the safer option.
Can I replace the upper or lower radiator hose myself?
Many owners can replace either the upper radiator hose or the lower radiator hose with basic hand tools if the hose has accessible clamps and fittings. Drain enough coolant to avoid spills, loosen clamps, and carefully remove the hose. Take note of routing and orientation for correct reinstallation. If access is restricted or connections are corroded, professional help may be wise.
What causes a coolant hose leak on the Infiniti G37?
Leaks often result from age-related degradation, such as cracking, swelling, or collapsed internal layers. Improper clamp tension or damaged connector surfaces can also allow seepage. External abrasion from rubbing against components may wear through a hose over time. Identifying the leak source helps determine whether a simple clamp adjustment or full hose replacement is required.
Should I use OEM or aftermarket radiator hoses?
OEM radiator hose designs are intended to match original shape and fitment exactly, which can simplify installation. Aftermarket options vary in material and construction and may offer enhanced durability or different styling. The best choice depends on whether you prioritize exact factory fit or upgraded material properties. Confirm compatibility with the Infiniti G37 before deciding.
How often should radiator hoses be inspected or replaced?
Inspect hoses regularly during routine maintenance, such as at oil changes or coolant service intervals. Many hoses show visible signs of wear long before catastrophic failure, so early detection is common. Replacement frequency depends on material and driving conditions, but proactive inspection helps avoid unexpected issues.
Do radiator hose clamps matter for a reliable seal?
Yes, the correct clamp type and proper tension are important for preventing leaks. Worm-drive clamps, constant-tension clamps, or factory-style clips each provide different sealing behaviors. Ensure clamps are in good condition and tightened evenly without overcompressing the hose, which can cause damage.
How We Chose the Best Infiniti G37 Radiator Hose
We evaluated candidate hoses for the Infiniti G37 using practical, vehicle-specific criteria that reflect real-world service needs. Key factors included material and construction quality, such as reinforced silicone or EPDM rubbers that resist heat and oil exposure. Fitment accuracy and factory-style connectors were assessed to ensure a correct seal and minimal trimming or modification. Hose dimensions and size fitment checks were applied to confirm proper routing and clearance under the hood. Attachment compatibility examined clamp style and securing points so installation is straightforward. Durability indicators such as wall thickness, heat rating, and abrasion resistance were considered to estimate service life. We excluded generic, universal-fit hoses that require substantial modification and any items lacking clear compatibility information for the Infiniti G37. The resulting list focuses on hoses that balance longevity, correct fit, and straightforward installation for this vehicle.
Our full evaluation process is outlined in our review methodology.
Conclusion
When choosing an Infiniti G37 radiator hose, prioritize correct fitment and durable construction. Matching the hose dimensions and bend geometry to factory specifications prevents stress and routing issues, while higher-grade materials and reinforcement extend service life. Balance ease of installation and connector compatibility against long-term durability. Regular inspection and choosing a hose rated for heat and chemical resistance will reduce the chance of leaks and unexpected cooling system failures.
Explore More:
- Check out all Infiniti G37 parts & accessories
- Explore Cooling System
- Browse all Auto Parts
